Medical Definition of palatine bone
: a bone of extremely irregular form on each side of the skull that is situated in the posterior part of the nasal cavity between the maxilla and the pterygoid process of the sphenoid bone and that consists of a horizontal plate which joins the bone of the opposite side and forms the back part of the hard palate and a vertical plate which is extended into three processes and helps to form the floor of the orbit, the outer wall of the nasal cavity, and several adjoining parts—called also palate bone, palatine
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